Dockboards
US4718136A · kind A · utility
Inventors
Key dates
| Filing date | Jul 23, 1986 |
| Grant date | Jan 12, 1988 |
| Priority date | — |
| Expiry date | Jul 23, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65G69/2823
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A dockboard comprising a ramp assembly, a frame for supporting the ramp assembly for pivotal movement in a pit formed in a loading dock, a hydraulic piston-cylinder assembly mounted on the bottom of the pit in the loading dock for pivoting the ramp assembly with respect to the supporting means, a lip assembly pivotally mounted on the free end of the ramp assembly, a hydraulic piston-cylinder assembly mounted on the ramp assembly for pivoting the lip assembly to an extended position forming a continuation of said ramp assembly, the ramp assembly including a tread plate and a plurality of hinge plates mounted in a parallel spaced relation on the tread plate, each hinge plate including an ear, and a stop bar mounted on the end of the ramp assembly in the path of travel of the ears for limiting the pivotal movement of the lip assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.